[PATCH users/roland/osabi-assert] Do not crash on unrecognized GNU .note.ABI-tag values

[Roland McGrath <mcgrathr@google.com>]

Diagnosis of unexpected input (in this case, in an executable file)
should not crash as if it were a bug in GDB.  This one is especially
harmless, since the "osabi" has so little effect on anything.

OK for trunk and 7.9 branch?


Thanks,
Roland


gdb/
2015-05-28  Roland McGrath  <mcgrathr@google.com>

	* osabi.c (generic_elf_osabi_sniff_abi_tag_sections): Use warning
	rather than internal_error for an unrecognized value.

diff --git a/gdb/osabi.c b/gdb/osabi.c
index 9d90c55..abf4bd4 100644
--- a/gdb/osabi.c
+++ b/gdb/osabi.c
@@ -493,10 +493,9 @@ generic_elf_osabi_sniff_abi_tag_sections (bfd
*abfd, asection *sect, void *obj)
 	      break;

 	    default:
-	      internal_error (__FILE__, __LINE__,
-			      _("generic_elf_osabi_sniff_abi_tag_sections: "
-				"unknown OS number %d"),
-			      abi_tag);
+              warning ("GNU ABI tag value %u unrecognized.\n", abi_tag);
+              *osabi = GDB_OSABI_UNKNOWN;
+              break;
 	    }
 	  return;
 	}